Default Color for Track Type not consistent between project and mixer

Hi Guys,

I have set to black my default color for GROUPS, but every time I create a group, it creates a grey channel on the mixer but black on the project window.
After some time, I discovered that the problem is only because the channel is 100% black… R=0 G=0 B=0 … If I change to any other color it work and also If I change the value of the RGB to somthing different than 0 0 0 it also work. a minor bug, but a bug…

Can anyone confirm this ??